Results 21 to 30 of about 386,546 (279)

Constraining A 4 leptonic flavour model parameters at colliders and beyond

Journal of High Energy Physics, 2019
The observed pattern of mixing in the neutrino sector may be explained by the presence of a non-Abelian, discrete flavour symmetry broken into residual subgroups at low energies.
Lukas Heinrich, Holger Schulz, Jessica Turner, Ye-Ling Zhou   +3 more
doaj   +1 more source

Measurement of D 0 − D ¯ $$ {D}^0-\overline{D} $$ 0 Mixing Parameters Using Semileptonic Decays of Neutral Kaon

Journal of High Energy Physics, 2020
We propose a new method to extract D 0 − D ¯ $$ {D}^0-\overline{D} $$ 0 mixing parameters using the D 0 → K ¯ $$ \overline{K} $$ 0 π 0 decay with the K ¯ $$ \overline{K} $$ 0 reconstructed in the semileptonic mode.
P. Pakhlov, V. Popov
doaj   +1 more source

Long-lived sterile neutrinos at the LHC in effective field theory

Journal of High Energy Physics, 2021
We study the prospects of a displaced-vertex search of sterile neutrinos at the Large Hadron Collider (LHC) in the framework of the neutrino-extended Standard Model Effective Field Theory (νSMEFT).
Jordy de Vries, Herbert K. Dreiner, Julian Y. Günther, Zeren Simon Wang, Guanghui Zhou   +4 more
doaj   +1 more source

AdS/QCD Phenomenological Models from a Back-Reacted Geometry [PDF]

, 2006
We construct a fully back-reacted holographic dual of a four-dimensional field theory which exhibits chiral symmetry breaking. Two possible models are considered by studying the effects of a five-dimensional field, dual to the $q\bar{q}$ operator.
C. Csáki, D.Z. Freedman, E. Witten, Feng Wu, J. Hirn, J.M. Maldacena, J.P. Shock, Jonathan P Shock, L. Da Rold, N. Evans, S.J. Brodsky, Yue-Liang Wu, Zhi-Feng Xie   +12 more
core   +2 more sources

Probing the dark sector through mono-Z boson leptonic decays

Journal of High Energy Physics, 2018
Collider search for dark matter production has been performed over the years based on high p T standard model signatures balanced by large missing transverse energy. The mono-Z boson production with leptonic decay has a clean signature with the advantage
Daneng Yang, Qiang Li
doaj   +1 more source

Two-body lepton-flavour-violating decays in a 2HDM with soft family-lepton-number breaking

Journal of High Energy Physics, 2022
We evaluate the decays ℓ 1 ± $$ {\ell}_1^{\pm } $$ → ℓ 2 ± γ $$ {\ell}_2^{\pm}\gamma $$ , Z → ℓ 1 + ℓ 2 − $$ {\ell}_1^{+}{\ell}_2^{-} $$ , and h → ℓ 1 + ℓ 2 − $$ {\ell}_1^{+}{\ell}_2^{-} $$ , where ℓ 1 and ℓ 2 are charged leptons with different flavours ...
Darius Jurčiukonis, Luís Lavoura
doaj   +1 more source

Fitting the Zb b ¯ $$ Zb\overline{b} $$ vertex in the two-Higgs-doublet model and in the three-Higgs-doublet model

Journal of High Energy Physics, 2021
We investigate the new contributions to the parameters g L and g R of the Zb b ¯ $$ Zb\overline{b} $$ vertex in a multi-Higgs-doublet model (MHDM). We emphasize that those contributions generally worsen the fit of those parameters to the experimental ...
Darius Jurčiukonis, Luís Lavoura
doaj   +1 more source

Phenomenological models of Universe with varying $G$ and $\Lambda$ [PDF]

, 2014
In this article we will consider several phenomenological models for the Universe with varying $G$ and $\Lambda(t)$, where $G$ is the gravitational "constant" and $\Lambda(t)$ is a varying cosmological "constant".
Khurshudyan, M.
core   +2 more sources

Three Generations in Type I Compactifications [PDF]

, 1998
Generalizing the recent work on three-family Type I compactifications, we classify perturbative Type I vacua obtained via compactifying on the T^6/Z_2 X Z_2 X Z_3 orbifold with all possible Wilson lines. In particular, we concentrate on models with gauge
A. Dabholkar, A. Sagnotti, C. Angelantonj, C.G. Callan, C.G. Callan, D.C. Dunbar, E. Witten, E.G. Gimon, E.G. Gimon, G. Pradisi, G. Zwart, J. Dai, J. Lykken, J. Polchinski, J. Polchinski, J. Polchinski, M. Berkooz, M. Bianchi, M. Bianchi, N. Arkani-Hamed, N. Ishibashi, P. Hořava, P. Hořava, R.G. Leigh, S.-H. Henry Tye, S.M. Roy, S.M. Roy, Z. Bern, Z. Kakushadze, Z. Kakushadze, Z. Kakushadze, Z. Kakushadze, Zurab Kakushadze   +32 more
core   +3 more sources

Searches for other vacua. Part I. Bubbles in our universe

Journal of High Energy Physics, 2019
We discuss models in which vacua other than our own can be directly observed in the present universe. Models with density-dependent vacuum structure can give rise to ‘non-lethal’-vacua: vacua with lower energy-density than our vacuum, but only in regions
Anson Hook, Junwu Huang
doaj   +1 more source